MSE: Implement TrackDefault object

Source/modules/mediasource/TrackDefault.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef TrackDefault_h
+#define TrackDefault_h
+
+namespace blink {
+
+class TrackDefault FINAL : public GarbageCollectedFinalized<TrackDefault>, public ScriptWrappable {
+    DEFINE_WRAPPERTYPEINFO();
+public:
+    enum TrackDefaultTypeCode {
+        TrackDefaultTypeAudio,
+        TrackDefaultTypeVideo,
+        TrackDefaultTypeText
+    };
+
+    static TrackDefault* create(const AtomicString& type, const String& language, const String& label, const Vector<String>& kinds, String& byteStreamTrackID, ExceptionState& exceptionState)
+    {
+        return new TrackDefault(type, language, label, kinds, byteStreamTrackID, exceptionState);
+    }
+
+    static const AtomicString& audioKeyword();
+    static const AtomicString& videoKeyword();
+    static const AtomicString& textKeyword();
+
+    virtual ~TrackDefault() { }
+
+    // Implement the IDL
+    String type() const;
+    String byteStreamTrackID() const { return m_byteStreamTrackID; }
+    String language() const { return m_language; }
+    String label() const { return m_label; }
+    Vector<String> kinds() const { return m_kinds; }
+
+    void trace(Visitor*) { }
+
+private:
+    TrackDefault(const AtomicString& type, const String& language, const String& label, const Vector<String>& kinds, const String& byteStreamTrackID, ExceptionState&);
+
+    AtomicString m_type;
+    String m_byteStreamTrackID;
+    String m_language;
+    String m_label;
+    Vector<String> m_kinds;
+};
+
+} // namespace blink
+
+#endif // TrackDefault_h